Pump



June 26, 1923. 1,460,295

A. J. WELDEN PUMP Filed Jan. 4. 1922 2 Sheets-Sheet 1 June 26, 1. 923.

A. J. WELDEN PUMP Filed Jan. 4. 1922 2 Sheets-Sheet 2 A.J/7 ZZ Patented June 26, 1923.

UNITED s'rarss ANDREW JACKSON VVELDEN, OF GRIFFIN, GEORGIA.

PUMP.

Application filed January 4, 1922.

T all whomit may concern:

Be it known that ANDREW J AGKSQN VVEL- DEN, a citizen of the United States of America, residing at Griiiin, in the county of i Spalding and State of Georgia, has invented new and useful Improvements in Pumps, of which the following is a specification.

The object of the invention is to provide a simple and efiicient pressure pump designed y for automatic action. under the impulse of a supply of air under pressure, as from a suitable condenser or compresser, controlled by a float which is actuable by the liquid con tents of the pump cylinder, and the particular object of the present invention is to effect an improvement upon the construction shown and described in my co-pending application No. 442,812 filed Feb. 5, 1921, in the matter of the control of the valves with which the pressure inlet and outlet ports are fitted and which as in the previous construction are actuable by means under the control of a float of which themovements are dependent upon the water or other liquid contents of the tank; and more especially to provide in this connection a more positive means for effecting the-closing of the inlet and the opening of the vent valve when the liquid contents of the tank have become exhausted or have been expelled by the pressure of the air admitted through the inlet port; andwith these objects in view the invention consists in a construction and combination of parts of which a preferred embodiment is shown in the accompanying drawings, wherein Figure 1 is a side view of'a pump mechanism embodying" the invention. a

, Figure 2 i's'pa sectional view takenverticallv of the same.

Figure 3 is a sectionsimilar to Figure 2 on :1 plane at right angles thereto.

Figures 1 and 5 are transverse horizontal sections on the planes indicated respectively by the lines 1& and 5-5 of Figure 3.

The mechanism consistsessentially of a tank, which as in the former construction maybe of any desired shape and dimensions or capacity, in which is centrallyarranged a longitudinally movable. tappet rod 11 located between the water outlet pipes 12 which are open at their lower ends and are united with a service pipe 13. said tappet rod being mounted in guides 14 secured to and supported by the outlet pipes and carrying a tappet pin 15 which is arranged in the Serial N0. 526,912.

path of upward movementof a float 1 6 of a area approximating the interior of the tank and having an open center 17 which is of a diameter adapting it to pass the upper tappet guide 14.

The communication between a chamber 18 with which the upper ends of the outlet pipes connect and the service pipe 13, is controlled by an upwardly open valve 19 adapted to be unseatedby water pressure applied to the underside thereof as when water is being discharged under pressure from the tank through the pipes 12. 7

Connected with the upper end of the tape pet rod are the inner ends of levers 20 and 21 pivotally mounted at their outer ends as shown at 22 and 28 and intermediately connected to the stems 24 and 25 of oppositely opening outlet and inlet valves 27 and 26 which control communication between the tank and the pressure inlet and outlet pipes 28 and 29 designed respectively for admitting pressure from the compressor or other source to the tank and for permitting the exhaust of pressure from the tank. -The 1.;

inlet valve 26 is mounted to seat by movement toward the tank while the outlet or vent valve 27 is mounted for. seating movement inthe opposite direction so that when the tappet rod is moved upwardly theinlet valve is unseated and the outlet valve is seated. Preferably the lever 21 which car,-

ries the outlet valve is positively connected at its inner end with the tappet rod as by a pivot 30. but the inner end of the lever 2U which carries (the pressure or inlet valve preferably rests upon or in -the path upwardmovement of the tappet rod so that while said lever 20 is positively, movab'le by the tappet :rod in its upward stroke. the rod is free to descend independently thereof. v

The tappet rod is weighted or is made of a material and dimensions adaptincqit when released to drop by gravity and thereby .by reason of pressure in the tank at the moment of release or downward movement of the tappet rod. To maintain the tappet rod in position to hold the outlet or vent valve in its closed or seated position and at the same time hold the inlet pressure valve in its unseated or receiving position, a locking means is provided for the tappet rod, and in this construction illustrated said means consists of latches 31 pivotally mounted as at 32 upon the lower guide 14, or any other suitable supporting means having a fixed position in the tank, and actuable yieldingly by springs 33, said latches having noses 34 for engagement with a shoulder 35 on the tappet rod formed for example by a circumferential groove cut therein. Said latches are also provided with trip arms 36 which are extended outward to terminally lie in the path of downward movement of the float.

The water inlet port 37 of the tank is controlled by a foot valve 38 adapted to be unseated by exterior pressure when the interior pressure is relieved.

' In operation assuming that the parts are in the position indicated in Figure 2 with the pressure inlet valve 26 unseated to admit pressure to expel the liquid contents of the tank which may be assumed to have reached about the level indicated by the dotted line 39, with the pressure outlet or Vent valve 27 seated so that the pressure of the air is applied to the liquid contents of the tank, with the water inlet valve 38 closed and the water outlet valve 19 open to permit of water passing up through the water outlet pipes 12 and the service pipe 13. it will be obvious that the tappet rod will be re- I 'tained in its elevated position by the latches 31 until they are tripped by the turther downward movement of the float which, depressing the trip arms and withdrawing the latch noses from the shoulder 35 will release the tappet rod and permit it to drop forcibly to open the pressure outlet or vent valve 27 and permit of the closing of the pressure inlet valve 26 by the air pressure supplemented by the weight of the lever 20. Obviously'this rearrangement o'fthe parts will immediately reduce the pressure in the tank and will result in the closing of the water outlet valve 19 by the weight of water in the service pipe 13, and the opening of the inlet or{ foot valve 38 by the exterior pressure which is incident to the weight of 'outside water in which the tank is submerged. In the construction illustrated the inlet port 37 is connected with teed pipes 40 having upwardly directed arms 41 fitted with guard screens or sieves 42.

The indicated rearrangement of the parts will remain until the water in the tank has raised the float sutliciently to cause its on gagement with the trip pin 15 whereupon the further elevation of the float will raise the tappet rod and with it the inner ends of the valve levers to effect simultaneously the closing of the outlet or vent valve 27 and the opening of the inlet or pressure valve 26. This elevation of the tappet rod, however, has brought the seat 35 thereof into position for engagement by the latches 31, and therefore while air pressure is immediately supplied through the pipe 28 to force the water out of the tank through the pipes 12, and hence to cause the gradual lowering of the float, the tappet rod will have been engaged and will be supported in the elevated position by the latches 31 and will remain in such elevated position until the float has again receded by the discharge of the water sufiiciently to engage the trip arms 36 and disengage the latches from the tappet rod.

Having described the invention, what is claimed as new and useful is 1. A pump having a tankprovided with a bottom valved inlet, a water discharge pipe having valved communication atits upper end with a service pipe, oppositely opening pressure and vent valves for respectively controlling the admission of pressure to and the exhaust of pressure from the interior of the tank, a tappet rod havingconnection with said valves and provided with a transverse tappet pin, a latch mechanism for engaging and holding the tappet rod in its elevated position and provided with a trip arm, and-a float mounted for actuation by the liquid contents of the tank and located between said tappet pin and trip for successively actuating the same as it approaches the limits of its movementin opposite directions.

2. A pump having a tank provided with a bottom valved inlet, a water discharge pipe having valved communication at its upper end with a service pipe, oppositely opening pressure and vent valves for respectively controlling the admission of pressure to and the exhaust of pressure from the interior of the tank, a tappet rod having connection with said valves and provided with a transverse tappet pin. a latch mech anism forengaging and holding the tappet rod in' its elevated position and provided with a trip arm, and a float mounted for actuation by the liquid contents of the tank and located between said tappet pin and trip for successively actuating the same as it approaches the limits of its movement in opposite directions. the water discharge pipe consisting of parallel members carrying up per and lower guides for the support of said tappet rod.

3. A pump having a tank provided with a bottom valved inlet, a water discharge pipe having valved communication at its upper end with a service pipe, oppositely opening pressure and vent valves for respectively controlling the admission of pressure to and the exhaust of pressure from the interior of the tank, a tappet rod having connection with said valves and provided with a transverse tappet pin. a latch mechanism for engaging and holding the tappet rod in its elevated position and provided with a trip arm, and a fioat mounted for actuation by the liquid contents of the tank and located between said tappet pin and trip for successively actuating the same as it approaches the limits of its movement in opposite directions, the connection between the tappet rod and the vent valve consisting of a lever pivotally connected with the tappet rod and carrying the stem of said valve.

at. A pump having a tank provided with a bottom valved inlet, a water discharge pipe having valved communication at its upper end with a service pipe, oppositely opening pressure and vent valves for re spectively controlling the admission of pressure to and the exhaust of pressure from the interior of the tank, a tappet rod having connection with said valves and pro.-

vided with a transverse tappet pin, a latch mechanism for engaging and holding the tappet rod in its elevated position and provided with a trip arm, and a float mounted for actuation by the liquid contents of the tank and located between said tappet pin and trip for successively actuating the same as it approaches the limits of its movement in opposite directions, the connection between the pressure valve and the tappet rod 7 consisting of a lever carrying the stem of path of upward movement of the tappet rod.

5. A pump having a tank provided with a a bottom valved inlet, a water discharge anism for engaging and holding the tappet rod in its elevated position and provided with a trip arm, and a float mounted for actuation by the liquid contents of the tank and located between said tappet pin and trip for successively actuating the same as it approaches the limits of its movement in opposite directions, the tappet rod being provided with a shoulder and the latch mechanism having pivotally mounted latches yieldingly held in position for engagement with said shoulder.

In testimony whereof he afiixes his signature.

ANDREW JACKSON WELDEN.

said valve and terminally arranged in the 

